Dark matter from scalar field fluctuations · HackerPapers discussions

Dark matter from scalar field fluctuations — mentioned by raattgift

Sat, 10 Aug 2019 17:46:24 GMT

The paper proposes that the entirety of dark matter is a massive free (as in non-interacting and non-self-interacting) field that appeared at the end of inflation, but before big bang nucleosynthesis ("BBN"). In order to make this work with observations of the cosmic microwave background, the field has to have much lower mass earlier during inflation than at inflation's end. The mass-gaining mechanism is not elucidated. There is only one known scalar field -- the Higgs -- and it is far from a free field. Any non-gravitational interaction between this proposed field and the rest of the…

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Dark matter from scalar field fluctuations — mentioned by raattgift

Sat, 10 Aug 2019 16:57:23 GMT

> Can anyone explain I'll try. The tl;dr is at the end before my own footnote. The author certainly doesn't make it easy, even for people familiar with the standard model of cosmology. The very first sentence of the paper [ https://arxiv.org/abs/1905.01214 ] reads, "Dark matter (DM) may have its origin in a pre-big-bang epoch. It may have been produced, for example, by decays or annihilations of particles during the Big Bang, i.e. by the so-called ’freeze-in’ [1–3] mechanism, or by e.g. the misalignment mechanism which generated a non-zero DM abundance during cosmic inflation (see e.g.…

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Dark matter from scalar field fluctuations — mentioned by saagarjha

Fri, 09 Aug 2019 15:46:04 GMT

PDF on arXiv: https://arxiv.org/pdf/1905.01214.pdf

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Dark matter from scalar field fluctuations — mentioned by ISL

Fri, 09 Aug 2019 15:06:21 GMT

ArXiv link: https://arxiv.org/abs/1905.01214

Paper and discussion history. A mention is not an endorsement.